WO2014094429A1

WO2014094429A1 - Precise air-conditioning system, and method and device for controlling blower thereof

Info

Publication number: WO2014094429A1
Application number: PCT/CN2013/080315
Authority: WO
Inventors: 张广河
Original assignee: 华为技术有限公司
Priority date: 2012-12-18
Filing date: 2013-07-29
Publication date: 2014-06-26
Also published as: EP2813776A4; EP2813776B1; CN102980274B; CN102980274A; EP2813776A1

Abstract

A method for controlling the blower of a precise air-conditioning system, comprising: obtaining the actual room temperature, and calculating the temperature difference between the actual temperature and a target temperature; comparing the temperature difference and threshold intervals to obtain the threshold interval within which the temperature difference falls, each threshold interval corresponding to a quantity value of blowers; obtaining the quantity value of blowers corresponding to the threshold interval within which the temperature difference falls according to the corresponding relationship between the threshold interval and the quantity value of blowers; controlling N number of blowers to operate at a first rotating speed, and controlling the blowers other than the N number of blowers to operate at a second rotating speed, the first rotating speed being higher than the second rotating speed. Also provided are a precise air-conditioning system, and device for controlling the blower thereof.

Description

Precision air conditioning system fan control method, device and precision air conditioning system

The invention relates to air conditioning control technology, in particular to a fan control method, device and precision air conditioning system for a precision air conditioning system.

Background technique

In a precision air conditioning system, it usually includes multiple fans and compressors. At startup, the fan needs to be turned on and then the compressor is turned on to ensure the reliable operation of the components in the system through the cooling effect of the fan. In the prior art, during the working process of the precision air conditioning system, all the fans are always running at the rated speed, that is, the total output air volume of the fan is fixed; gp, the total output air volume of the fan always maintains the maximum air volume, that is, the whole precision The fan consumes a lot of energy in the air conditioning system. Summary of the invention

The embodiment of the invention provides a fan control method and device for a precision air conditioning system and a precision air conditioning system, which are used to solve the problem that the total output air volume of all the fans in the precision air conditioning system in the prior art is fixed and the energy consumption is large.

An aspect of the present invention provides a method for controlling a fan of a precision air conditioning system, comprising: acquiring an actual temperature in a room, and calculating a temperature difference between the actual temperature and a preset target temperature;

Comparing the temperature difference with the threshold interval to obtain a threshold interval in which the temperature difference is located, wherein the threshold interval is separated by a plurality of thresholds, and each threshold interval corresponds to a fan number value;

Obtaining, according to a correspondence between the threshold interval and the number of fans, a value of the number of fans corresponding to the threshold interval in which the temperature difference is located, N is a natural number;

Controlling N fans of all the fans to operate at the first speed, and controlling other fans of the all fans except the N fans to operate at the second speed, wherein the first speed is higher than The second rotational speed, N is less than the number M of all fans, and M is a natural number.

In a first possible implementation manner of the first aspect, before the obtaining the actual temperature in the room and calculating the temperature difference between the actual temperature and the preset target temperature, the method further includes:

A correspondence between the threshold interval and the number of fans is generated.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the obtaining the temperature difference according to a correspondence between a threshold interval and the fan quantity value The value of the number of fans corresponding to the threshold interval is N, including:

And if the threshold interval in which the temperature difference is located is a first threshold interval, obtaining a corresponding fan number value N1 of the first threshold region;

And if the threshold interval in which the temperature difference is located is a second threshold interval, obtaining a corresponding fan number value N2 in the second threshold region;

And if the threshold interval in which the temperature difference is located is a third threshold interval, obtaining a corresponding fan number value N3 of the second threshold region;

Where N1>N2>N3, and N1 M.

In conjunction with the first aspect, or the first possible implementation of the first aspect, in a third possible implementation of the first aspect, the controlling the N fans of all the fans to operate at the first speed and controlling all After the fan other than the N fans is operated at the second speed, the fan includes:

The compressor is turned on and/or off to control a compressor corresponding to the fan to form an air conditioning duct subsystem with the fan.

A second aspect of the present invention provides a controller, including:

Obtaining a module, configured to acquire an actual temperature in the room, and calculate a temperature difference between the actual temperature and a preset target temperature;

a comparison module, configured to compare the temperature difference with a threshold interval to obtain a threshold interval in which the temperature difference is located, where the threshold interval is separated by a plurality of thresholds, and each threshold interval corresponds to a fan number value ;

a processing module, configured to obtain, according to a correspondence between the threshold interval and the fan number value, a number of fans corresponding to the threshold interval where the temperature difference is located, N, where N is a natural number;

a control module, configured to control N fans of all the fans to operate at a first speed, and control other fans of the all fans except the N fans to operate at a second speed, wherein the One speed is higher than the second speed, N is less than the number M of all fans, and M is a natural number.

In a first possible implementation manner of the second aspect, the method further includes:

The correspondence generation module is configured to generate a correspondence between the threshold interval and the number of fans to be operated at the first rotation speed.

In a second possible implementation manner of the second aspect, the processing module includes:

a first control unit, configured to acquire a fan number value N1 corresponding to the first threshold interval when the threshold interval in which the temperature difference is located is a first threshold interval;

a second control unit, configured to acquire a wind turbine quantity value N2 corresponding to the second threshold interval when the threshold value interval is the second threshold interval;

a third control unit, configured to acquire a fan number value N3 corresponding to the second threshold interval when the threshold interval in which the temperature difference is located is a third threshold interval;

Where N1>N2>N3, and N1 M.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the method further includes:

a compressor control module for turning on and/or off the compressor to control a compressor corresponding to the fan to form an air conditioning duct subsystem with the fan.

A third aspect of the present invention provides a precision air conditioning system comprising: M evaporators, M compressors, M fans, and a controller; M is an integer greater than or equal to 2;

Wherein, the Kth evaporator, the Kth compressor and the Kth fan constitute a Kth air duct subsystem, the Kth evaporator is connected to the Kth compressor, and the corresponding Kth fan is used for the cooling station The Kth evaporator, wherein K is an integer, and 1 KM;

The controller is configured to acquire an actual temperature in the room, calculate a temperature difference between the actual temperature and a preset target temperature, compare the temperature difference with a threshold interval, and obtain the temperature difference a threshold interval, wherein the threshold interval is separated by a plurality of thresholds, each threshold interval corresponding to a fan number value; and the threshold interval of the temperature difference is obtained according to a correspondence between the threshold interval and the fan number value Corresponding fan number values N, N are natural numbers; control N fans in all fans to run at the first speed, and control all fans except the N fans to operate at the second speed, first The rotation speed is higher than the second rotation speed, and N is smaller than the number M of all the fans, and M is a natural number.

In a first possible implementation manner of the third aspect, the method further includes: a sensor for detecting an actual temperature in the room and transmitting to the processor.

In a second possible implementation of the third aspect, the M-1 partitions respectively disposed between adjacent air duct subsystems are further included.

The fan air conditioning system control method and device and the precision air conditioning system provided by the invention can adjust the number of fans running at a higher first speed according to the actual temperature change of the environment, thereby reducing the total output air volume of the fan during long-term operation, thereby Reduced fan energy consumption. DRAWINGS

1 is a flowchart of a method for controlling a fan of a precision air-conditioning system according to an embodiment of the present invention; FIG. 2 is a flowchart of a method for controlling a fan of a precision air-conditioning system according to another embodiment of the present invention; FIG. 4 is a schematic structural diagram of a controller according to an embodiment of the present invention; FIG.

FIG. 5 is a schematic structural diagram of a controller according to another embodiment of the present disclosure;

6 is a schematic structural view of an embodiment of the processing module of FIG. 4;

FIG. 7 is a schematic structural diagram of a controller according to another embodiment of the present invention; FIG.

FIG. 8 is a schematic structural diagram of a precision air conditioning system according to an embodiment of the present invention; FIG.

9 is a schematic structural view of an embodiment of a precision air conditioning system including three air duct subsystems provided by the present invention;

Figure 10 is a block diagram showing another embodiment of a precision air conditioning system including three air duct subsystems provided by the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

1 is a flowchart of a method for controlling a fan of a precision air conditioning system according to an embodiment of the present invention. As shown in FIG. 1 , the embodiment provides a method for controlling a fan of a precision air conditioning system, including: Step 101: Obtain an actual temperature in a room. Calculating a temperature difference between the actual temperature and a preset target temperature;

Step 102: Compare the temperature difference with a threshold interval to obtain a threshold interval in which the temperature difference is located, where the threshold interval is separated by a plurality of thresholds, and each threshold interval corresponds to a fan number value; Step 103: Acquire, according to a correspondence between the threshold interval and the fan number value, a value of the fan number N corresponding to the threshold interval in which the temperature difference is located, where N is a natural number;

Step 104: Control N fans of all fans to run at a first speed, and control other fans of the fans except the N fans to operate at a second speed, wherein the first speed is higher than the second speed, N Less than the number of all fans M, M is a natural number.

The execution body of this embodiment may be a processor; wherein the actual temperature may be acquired by the sensor, and the target temperature may be preset by the user in the processor through the input device.

Specifically, before the obtaining the actual temperature in the room and calculating the temperature difference between the actual temperature and the preset target temperature, the method may further include:

Preferably, the threshold may include a first threshold and a second threshold, where the first threshold is greater than a second threshold; the first threshold and the second threshold are separated to form a first threshold interval, a second threshold interval, and a third threshold interval The value in the first threshold interval is greater than the first threshold, the value in the second threshold interval is greater than the second threshold, and is less than or equal to the first threshold, the third threshold The value in the interval is less than or equal to the second threshold; the number of fans corresponding to the first threshold interval, the second threshold interval, and the third threshold interval are: N1, N2, and N3, where N1>N2> N3, and NKM.

Further, the obtaining the fan number value N corresponding to the threshold interval in which the temperature difference is located according to the correspondence between the threshold interval and the fan number value may include:

If the threshold interval in which the temperature difference is located is a first threshold interval, obtaining a fan number value N 1 corresponding to the first threshold interval _;

If the threshold interval in which the temperature difference is located is a second threshold interval, obtaining a fan number value N 2 corresponding to the second threshold interval _;

If the threshold interval in which the temperature difference is located is a third threshold interval, the fan number value N3 corresponding to the second threshold interval is obtained. N3 can be 0 to turn off all fans when the temperature difference is reduced to a certain extent.

It should be noted that, in the correspondence between the threshold interval and the fan number value, the threshold may be more than two to separate more threshold intervals, that is, the threshold interval may include the first threshold interval. The second threshold interval and the third threshold interval may further include a third temperature difference threshold, a fourth temperature difference threshold, and the like, and correspondingly, the fan number value N is divided by the first number N1, The second number N2 may further include a third number N3 corresponding to the third threshold interval, a fourth number N4 corresponding to the fourth threshold interval, and the like; wherein, the total number of thresholds may be determined according to the total number of fans. Preferably, the total number of thresholds may be equal to the total number M of the fans, and the total number of threshold intervals may be M+1; for example, when the total number of fans is three, the threshold may include a first threshold, a second threshold, and a third threshold, and A first threshold interval, a second threshold interval, a third threshold interval, and a fourth threshold interval are respectively formed, and each threshold interval corresponds to a fan number value.

® — step, the control of each of the fans in the first speed operation, and control of all of the fans except the one of the fans to run at the second speed, may also include :

The compressor is turned on and/or off to control compressor operation corresponding to the fan.

The fan control method for the precision air conditioning system provided by the embodiment controls the fan of the different number of fans to operate at a higher first speed according to the actual temperature of the environment, and can control some of the fans in the entire precision air conditioning system under the premise of meeting the predetermined cooling demand. Rated speed operation reduces the total output air volume of all fans and reduces fan energy consumption.

Embodiment 2

This embodiment will be exemplified by a precision air conditioning system including a compressor 1, a compressor 2, an evaporator 1, an evaporator 2, and a fan 1 for cooling the evaporator 1 and a fan 2 for cooling the evaporator 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The technical solution of the present invention will be described in detail. In the present embodiment, the fan 1 and the fan 2 respectively adopt a fan which has only two working states: opening (rotating at rated speed, outputting air volume is fixed) and closing.

2 is a flow chart of a method for controlling a fan of a precision air conditioning system according to another embodiment of the present invention; as shown in FIG. 2, a fan control method for a precision air conditioning system provided by the embodiment includes:

Step 201: Generate a correspondence between a threshold interval and a fan number value in the processor, where the threshold interval may include a first threshold interval, a second threshold interval, and a third threshold interval, where the fan corresponding to the first threshold interval The number value N1 is 2, the fan number value Ν2 corresponding to the second threshold interval is 1, and the fan number value Ν3 corresponding to the third threshold interval is 0.

Step 202: The processor acquires an actual temperature Cl in the room, and generates a temperature difference A C according to the actual temperature C1 and a preset target temperature C; wherein:

AC = C1 - C ;

Step 203, comparing the temperature difference AC with each of the above threshold intervals; when the temperature difference is replaced (Details Article 26) When the AC falls within the first threshold interval, step 204a is performed; when the temperature difference AC falls within the second threshold interval, step 204b is performed _; when the temperature difference AC falls within the third threshold interval, step 204c is performed.

Step 204a, controlling both fans to run.

Step 204b, controlling one of the two fans to operate, and controlling the other fan to be in a closed state. Of course, the specific choice of the fan 1 or the fan 2 operation can be determined according to the specific working conditions, and is not particularly limited herein.

Step 204c, closing two fans.

Step 205: Turn on the compressor corresponding to the running fan to start the cooling process. Specifically, when the fan is running and the fan 2 is turned off, the compressor can be turned on and the compressor 2 is turned off; when the fan 2 is running and the fan is turned off, the compressor can be turned on, the compressor is turned off, and the fan is turned off; When both are closed, compressor one and compressor two are also closed.

It should be noted that, in this embodiment, the processor may acquire the actual temperature C1 of the environment once every preset interval, and then perform the steps after step 202, so that the fan 1 can be dynamically adjusted according to the change of the ambient temperature. And the working state of the fan 2, in the case of the actual temperature C1 of the environment is reduced to a certain value, in the premise of meeting the cooling demand, timely shut down the unnecessary fans and compressors in the system, thereby avoiding unnecessary energy consumption.

The fan control method for the precision air conditioning system provided in this embodiment adjusts the number of fans in the running state according to the actual temperature change of the environment, reduces the total output air volume of the fan during long-term operation, and reduces the energy consumption of the fan.

Embodiment 3

This embodiment also exemplifies a precision air conditioning system including a compressor 1, a compressor 2, an evaporator 1, an evaporator 2, and a fan 1 for cooling the evaporator 1 and a fan 2 for cooling the evaporator 2. The technical solution of the invention is described in detail. Different from the second embodiment, the fan 1 and the fan 2 in the embodiment can adopt a fan with an adjustable output air volume. Generally speaking, the fan with adjustable output air volume includes more than two working gear positions, such as high wind and low wind, or high wind, middle and low wind, when the fan is adjusted to high wind. The fan runs at the rated speed. When the fan is adjusted to the low or mid-range, the fan runs at a lower speed than the rated speed; therefore, the fan with adjustable output air volume includes at least the closed, lower than rated speed and rated speed. Three working states. Here, the rated speed represents the maximum speed that the fan can reach. For convenience of description, the present embodiment is described by taking the fan 1 and the fan 2 in three working states: closed, low wind, and high wind. It will be understood that the invention is not limited thereto.

3 is a flow chart of a control method for a fan of a precision air-conditioning system according to another embodiment of the present invention; as shown in FIG. 3, a fan control method for a precision air-conditioning system provided by the embodiment includes:

Step 301: Generate a correspondence between the threshold interval and the fan number value in the processor. The threshold interval may be separated by two thresholds, where the three threshold intervals are: a first threshold interval, where the values in the threshold interval are greater than the first threshold, and the number of fans corresponding to the first threshold interval is 2 The value in the second threshold interval is greater than the second threshold and less than or equal to the first threshold, and the number of fans corresponding to the second threshold interval is 1; the value in the third threshold interval is less than or equal to the second The threshold value, and the number of fans corresponding to the third threshold interval is 0.

Step 302: The processor acquires an actual temperature Cl in the room, and generates a temperature difference A C according to the actual temperature C1 and a preset target temperature C; wherein:

AC = Cl - C;

Step 303, comparing the magnitude relationship between the temperature difference Δ C and the first threshold and the second threshold; when the temperature difference AC is greater than the first threshold, performing step 204a _; when the temperature difference Δ C is greater than the foregoing When the threshold is less than or equal to the first threshold, step 204b is performed; when the temperature difference AC is less than or equal to the second threshold, step 204c is performed.

Step 304a, control ship 1 and ship 2 are all operated with high carving.

Step 304b, controlling one of the two fans to operate in a high windshield and controlling the other to operate at a low i3⁄4. Of course, the specific choice of the fan or the fan 2 to operate in a high windshield can be determined according to the specific working conditions, without special limitation.

Step 304c, controlling the ships one and two respectively to operate at a low speed.

Step 305: Turn on the compressor corresponding to the fan running in the high wind speed.

Specifically, when the fan is operated in a high windshield and the fan 2 is operated in a low windshield, the compressor can be turned on and the compressor 2 is turned off; when the fan 2 is operated in a high windshield and the fan is operated in a low windshield, The compressor can be turned on and the compressor 1 is turned off. When both the fan 1 and the fan 2 are operated in the low wind speed, the compressor 1 and the compressor 2 can be turned off.

The fan control method for the precision air conditioning system provided by the embodiment adjusts the number of fans running at a high speed according to the change of the actual temperature of the environment, and reduces the total output replacement page of the fan during the long-term operation (Article 26) The air volume reduces the energy consumption of the fan; in addition, in this embodiment, while controlling the partial fan to operate in a high wind speed and controlling other fans to operate in a low wind speed, the total output air volume of the fan can be reduced while preventing the high output. The fan other than the fan running in the windshield reverses, further protecting the fan. In addition, it can cool the other accessory components in the system, avoiding overheating damage of other accessory components, and further improving the reliability of the precision air conditioning system. Sex.

Each of the above embodiments is described by taking a precision air conditioning system including two fans, two compressors, and two evaporators as an example. However, the technical solution of the present invention is equally applicable to the technical solutions of the present invention. A precision air conditioning system using two or more fans, two or more compressors, and two or more evaporators only needs to ensure that the fan, the compressor and the evaporator are in one-to-one correspondence, that is, one fan is used to cool the corresponding one. The evaporator is connected to a corresponding one of the compressors to form an independent duct subsystem.

Embodiment 4

FIG. 4 is a schematic structural diagram of a controller according to an embodiment of the present invention; as shown in FIG. 4, each module in the controller may jointly perform a processing process performed by a controller in the method embodiment corresponding to FIG. 1. The controller provided in this embodiment includes:

The obtaining module 41 is configured to acquire an actual temperature in the room, and calculate a temperature difference between the actual temperature and a preset target temperature;

The comparison module 42 is configured to compare the temperature difference value with a threshold interval to obtain a threshold interval in which the temperature difference is located, where the threshold interval is separated by a plurality of thresholds, and each threshold interval corresponds to a number of fans Value

The processing module 43 is configured to use a correspondence between a threshold interval and the fan number value, and obtain a fan number value N, N corresponding to the threshold interval in which the temperature difference is located;

a control module 44, configured to control N fans of all the fans to operate at a first speed, and control other fans of the all fans except the N fans to operate at a second speed, wherein the first speed is higher than the second speed The speed, N is less than the number of all fans M, M is a natural number.

FIG. 5 is a schematic structural diagram of a controller according to another embodiment of the present invention; as shown in FIG. 5, the controller may further include:

The correspondence generation module 45 is configured to generate a correspondence between the threshold interval and the number of fans to be operated at the first rotation speed.

6 is a schematic structural diagram of an embodiment of the control module of FIG. 4; as shown in FIG. 6, the processing module Can include:

The first control unit 431 is configured to obtain, when the threshold interval of the temperature difference is the first threshold interval, the fan number value N1 corresponding to the first threshold interval;

a second control unit 432, configured to: when the threshold interval of the temperature difference is the second threshold interval, obtain the fan number value N2 corresponding to the second threshold interval;

The third control unit 433 is configured to acquire the fan number value N3 corresponding to the second threshold interval when the threshold interval is the third threshold interval; wherein N1>N2 and N1 M.

FIG. 7 is a schematic structural diagram of a controller according to another embodiment of the present invention; as shown in FIG. 7, each module and unit in the controller may jointly perform the implementation of the controller in the method embodiment corresponding to FIG. 2 and FIG. Process. The controller may further include: based on the controller shown in FIG. 5:

A compressor control module 46 is provided for turning the compressor on and/or off to control compressor operation corresponding to the fan.

The controller provided in this embodiment can determine the number of fans that need to be operated at a higher first speed according to the obtained actual temperature, so as to control some fans to rotate at a lower speed than the rated speed under the premise of meeting the predetermined cooling demand. Operation reduces the total output air volume of the fan, thus reducing fan energy consumption.

FIG. 8 is a schematic structural diagram of a precision air conditioning system according to an embodiment of the present invention. Referring to FIG. 4 and FIG. 8 , the precision air conditioning system provided by the embodiment includes: M evaporators 61, M compressors 63, and M Fan 62, and controller; M is an integer greater than or equal to 2;

The Kth evaporator 61, the Kth compressor 63 and the Kth fan 62 constitute a Kth air duct subsystem, and the Kth evaporator 61 can be connected to the Kth compressor 63 through a pipeline, and corresponds to The Kth fan 62 is used to cool the Kth evaporator 61, where K is an integer, and l ^K^M;

The above controllers include:

The comparison module 42 is configured to compare the temperature difference value with a threshold interval to obtain a threshold interval in which the temperature difference is located, where the threshold interval is separated by a plurality of thresholds, and each threshold interval corresponds to a number of fans value; The processing module 43 is configured to use a correspondence between a threshold interval and a fan number value, and obtain a numerical value N and N of the fan fan corresponding to the threshold interval in which the temperature difference is located;

FIG. 9 is a schematic structural diagram of an embodiment of a precision air conditioning system including three air duct subsystems provided by the present invention; as shown in FIG. 9, the precision air conditioning system may further include:

a sensor for detecting an actual temperature in the room and transmitting to the processor; and, respectively, M-1 partitions 6 disposed between adjacent air duct subsystems.

The two adjacent air duct subsystems may be separated by a partition plate 6, that is, the first air passage subsystem and the second air passage subsystem may be separated by a first partition, the second air passage subsystem and the third wind The track subsystems may be separated by a second partition, and the M-1th air duct subsystem and the Mth air duct subsystem may be separated by the M-1th partition.

In particular, the partition 6 can be used to completely isolate two adjacent duct subsystems (as shown in Figure 9); or the partition 6 can also be used to isolate two adjacent duct subsystems. For example, the partition 6 is disposed only at a position corresponding to the fan 62 and the compressor 63 corresponding to one duct subsystem and the fan 62 and the compressor 63 (shown in FIG. 10) of the adjacent duct subsystem.

In addition, the number of sensors may correspond to the number of air outlets of the air conditioning system, so that a sensor is correspondingly disposed at each air outlet, and the actual temperature obtained by the controller may be the temperature detected by each sensor. average value.

The precision air conditioning system provided in this embodiment can determine the number of fans that need to be operated at the rated speed according to the obtained actual temperature, so as to control the partial fan to run at a speed lower than the rated speed under the premise of meeting the predetermined cooling demand, and reduce The total output air volume of the fan compensates for the fixed air volume of the fan in the prior art precision air conditioning system, which reduces the energy consumption of the fan.

One of ordinary skill in the art will appreciate that all or part of the steps to implement the various method embodiments described above can be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the above-described method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as 匪, RAM, disk or optical disk.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, and not The invention is described in detail with reference to the foregoing embodiments, and those skilled in the art should understand that the technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be modified. The equivalents are made without departing from the scope of the technical solutions of the embodiments of the present invention.

Claims

claims

1. A fan control method for a precision air conditioning system, which is characterized by including:

Obtain the actual indoor temperature and calculate the temperature difference between the actual temperature and the preset target temperature;

Compare the temperature difference with a threshold interval to obtain the threshold interval in which the temperature difference is located, where the threshold interval is separated by several thresholds, and each threshold interval corresponds to a fan quantity value;

According to the corresponding relationship between the threshold interval and the fan quantity value, obtain the fan quantity value N corresponding to the threshold interval where the temperature difference is located, where N is a natural number;

Control N fans among all fans to run at a first speed, and control other fans among all fans except the N fans to run at a second speed, where the first speed is higher than the second speed, N It is less than the number M of all fans, and M is a natural number.

2. The precision air conditioning system fan control method according to claim 1, characterized in that, before obtaining the actual temperature in the room and calculating the temperature difference between the actual temperature and the preset target temperature, it also includes:

Generate the corresponding relationship between the threshold interval and the number of wind turbines.

3. The fan control method of a precision air conditioning system according to claim 2, characterized in that, according to the corresponding relationship between the threshold interval and the fan quantity value, the fan corresponding to the threshold interval in which the temperature difference is located is obtained. Quantity value N, including:

If the threshold interval where the temperature difference is located is the first threshold interval, obtain the fan quantity value N 1 corresponding to the first threshold interval _;

If the threshold interval where the temperature difference is located is the second threshold interval, obtain the fan quantity value N 2 corresponding to the second threshold interval _;

If the threshold interval where the temperature difference is located is the third threshold interval, obtain the fan quantity value N3 corresponding to the second threshold interval;

Among them, N1>N2>N3, and NKM.

4. The fan control method of a precision air conditioning system according to claim 1 or 2, characterized in that: controlling N fans among all fans to run at a first speed, and controlling all fans except the N fans. After the fans other than the fan are operated at the second speed, it also includes: turning on and/or turning off the compressor to control the compressor corresponding to the fan and the fan. Form the air conditioning air duct subsystem.

5. A controller, characterized in that it includes:

The acquisition module is used to obtain the actual indoor temperature and calculate the temperature difference between the actual temperature and the preset target temperature;

A comparison module, used to compare the temperature difference with a threshold interval to obtain the threshold interval in which the temperature difference is located, where the threshold interval is separated by several thresholds, and each threshold interval corresponds to a fan quantity value ;

A processing module, configured to obtain the fan quantity value N corresponding to the threshold interval in which the temperature difference is located based on the corresponding relationship between the threshold interval and the fan quantity value, where N is a natural number;

A control module configured to control N fans among all fans to operate at a first rotational speed, and to control other fans among all fans except the N fans to operate at a second rotational speed, wherein the first rotational speed is higher than The second speed, N is less than the number M of all fans, and M is a natural number.

6. The controller according to claim 5, further comprising:

The correspondence generation module is used to generate a correspondence between the threshold interval and the number of fans that need to run at the first speed.

7. The controller according to claim 5, characterized in that the processing module includes: a first control unit, configured to obtain the third threshold value when the temperature difference is in the first threshold value range. The number of fans corresponding to a threshold interval is N1;

The second control unit is configured to obtain the fan quantity value N 2 corresponding to the second threshold interval when the threshold interval in which the temperature difference is located is the second threshold interval _;

The third control unit is configured to obtain the fan quantity value N3 corresponding to the second threshold interval when the threshold interval in which the temperature difference is located is the third threshold interval;

Among them, N1>N2>N3, and NKM.

8. The controller according to claim 5 or 6, further comprising: a compressor control module, used to turn on and/or turn off the compressor to control the compressor corresponding to the fan and the fan. Form the air conditioning air duct subsystem.

9. A precision air conditioning system, characterized by including: M evaporators, M compressors, M fans, and controllers; M is an integer greater than or equal to 2;

Among them, the Kth evaporator, Kth compressor and Kth fan constitute the Kth air duct subsystem, the Kth evaporator is connected to the Kth compressor, and the corresponding Kth fan is used for cooling. The Kth evaporator, where K is an integer, and 1 K M;

The controller is used to obtain the actual temperature in the room, calculate the temperature difference between the actual temperature and the preset target temperature; compare the temperature difference with the threshold interval, and obtain the temperature difference where the temperature difference is located. A threshold interval, wherein the threshold interval is separated by a plurality of thresholds, and each threshold interval corresponds to a fan quantity value; according to the corresponding relationship between the threshold interval and the fan quantity value, the threshold interval in which the temperature difference is located is obtained Corresponding fan quantity value N, N is a natural number; control N of all fans to run at the first speed, and control all the fans except the N fans to run at the second speed, where the first The rotation speed is higher than the second rotation speed, Ν is less than the number M of all fans, and M is a natural number.

10. The precision air conditioning system according to claim 9, further comprising: a sensor for detecting the actual indoor temperature and sending it to the processor.

11. The precision air conditioning system according to claim 9, further comprising M-1 partitions respectively disposed between adjacent air duct subsystems.